Mykan
Oh Wise One
An even better idea would be, before the Wonder is full, to have the ability to reject, or eject someone's KP. Over the years I have played, more than once I have looked at the KP added and seen a player long since gone inactive, or a player that bailed on the fellowship or was kicked out. Those players neither need nor deserve anything for their KP, while other helpers are hurt by it.
Honestly can you imagine the abuse and fighting such a feature would cause. Has potential to rip fellowships apart. I could just go oh I don't like X now, boot your KP, or perhaps someone I want to get top prize is second, ok boot to number 1. How do you then deal with the mass influx of KP?
Personally I don't see the issue with people donating KP around like butterflies. A decent KP program should ensure such people get 0 chests (if thats the concern) and if your a solo player wouldn't every donation be welcome? certainly is for me when I solo level.